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for all sockets being installed.
Then remelt the corner
connections while applying pressure down on the board.
This will
remove any gaps that may be present between the IC sockets and
the PC board.
Finally, solder the remaining pins of the IC
sockets.
DIP HEADER SOLDERING
When making jumper connections on a DIP header, solder resistor
or capacitor lead snippings between the leads to be connected.
When more than two pins are to be connected together, bend a
single'wire so that it routes to each pin, and solder each pin
onc~~Insert th~
header in an IC socket on a PC board to hold it
during
soldering~
Overheating the pins with the soldering iron
will melt the plastic of the header.
If there are multiple
jumpers on a
he~d~r,
make sure that- no ijnintended connections are
mad~by ~ar~ful1yrouting
the jumpersi or by insulating each
jumper with
so~e
wire insulation.
RE8rSTORAND
CA~ACITOR INSTALLAT~ON
'.;,".
:<?~'
_0
Toinsfall
r~sisfors
or capacitors,' first make right angle bends
in the- leads to fi t the PC boar d hole spac ing.
(Some capac i tor
leads are already
appropri~tely
spaced and do not need bending.)
.
Tl:l.~n"-:it;ls_ert
the leads as far as possible through the correct
ho'leslnthe PC board and spread the leads slightly on the solder
_side, of the 'board to' keep the part in place.
After a group of
reiistors or
c~pacitors
has been
inser~ed,
then solder the leads
6n the solder side of the board and snip off the
exces~
leads as
'closerto the boatd as possible.
Use catition to avoid eye injury
from flying bits of wire.
Save the lead clippings for later use
"in making jumper connections.
,-
.
.
~
PIHNTEO' CIRCU-IT B,OARD' LAYOUT
The white component layout legend is printed on the component
sicl"eof a printed circuit (PC) board.
All components are
inserted from this side (component side) and soldered on the
other side (solder side).
Locations on the PC board are
identified by two-character codes as marked on the board: a digit
followed by a letter indicating the horizontal and vertical
coordinates of the location.
Note that in North Star kits, IC's
can be found
on
styrene pads in positions corresponding to their
intended locations on the PC board.
Pin numbering conventions for the S-100 edge pins are as follows:
When viewing the component side of the board (with the pin edge
facing down), pins 1,2, .... 50 range from left to right.
When
viewing the solder side of the board, pins 100, 99, ... , 51 range
from left to
right~
7
North Star 16K RAM-SOARD
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